How to pick a warm winter coat

In Eric Larsen’s world, minus-20 degrees Fahrenheit qualifies as “relatively warm.” He’s a polar explorer who regularly braves the coldest places on the planet — Antarctica, Greenland, the North Pole — where temperatures can reach minus-50.

“Having a good winter coat and using it properly is the difference between life and death,” says Larsen, based in Crested Butte, Colo. “It’s also the difference between being comfortable, which is my goal, and miserable.”